Granted Patent
Utility
US 5,338,853 · App. 07/793,741
Derivatives of N-HALS-substituted amic acid hydrazides
Inventors:
Ronald E. MacLeay, Harold Carl Lange
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Nov 18, 1991
Inventors
Ronald E. MacLeay
Harold Carl Lange
Assignee (at issue)
Elf Atochem North America, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.